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arXiv 0712.2264hep-ph
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红外光滑弯曲额外维的唯象

Phenomenology of Infrared Smooth Warped Extra Dimensions

Paul McGuirk, Gary Shiu, Kathryn M. Zurek

摘要:

我们研究了红外几何对体中具有规范场和费米子场的弯曲额外维现象的影响。我们特别关注的“质量间隙”度量,这是在紫外线的广告,但渐近线平坦的空间中的IR,打破共形对称。这些度量可以用来近似某些类的扭曲弦紧化所产生的几何。我们发现,类似于我们以前的结果Kaluza-Klein(KK)引力子,这些度规引起的现象学上显着的位移在分离的KK规范模式的质谱(高达~2的因素)和他们的耦合IR局域场(高达~5-10的因素增加)。我们发现,尽管在光谱的变化,从S的约束m_KK > 3 TeV仍然是强大的5-d质量间隙度量类,和T的变化是不够显着,以消除保管对称性的需要。

英文摘要:

We study the effect of the infrared (IR) geometry on the phenomenology of warped extra dimensions with gauge and fermion fields in the bulk. We focus in particular on a "mass gap" metric which is AdS in the ultraviolet, but asymptotes to flat space in the IR, breaking conformal symmetry. These metrics can be dialed to approximate well the geometries arising in certain classes of warped string compactifications. We find, similar to our earlier results on the Kaluza-Klein (KK) graviton, that these metrics give rise to phenomenologically significant shifts in the separation of KK gauge modes in the mass spectrum (up to factors of ~2) and their couplings to IR localized fields (up to factors of ~5-10 increase). We find that, despite shifts in the spectra, the constraint m_KK > 3 TeV from S remains robust in the class of 5-d mass gap metrics, and that the change to T is not significant enough to remove the need for custodial symmetry.

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